What is the difference between high and low coercivity magnetic stripes?

High coercivity cards are hold their charge longer, and therefore are more durable than low coercivity cards. High coercivity cards are made of a material that cannot easily be altered when exposed to magnetic fields such as a magnetic screw, while low coercivity cards may be damaged when exposed to such fields. Low coercivity stripes are typically printed on cheaper, disposable cards such as public transportation and airline tickets.